Osteohistological analysis and preservation stage of Coendou magnus Lund, 1839 (Rodentia, Erethizontidae) fossils recovered at Toca da Barriguda Cave, Northeastern Brazil
DOI:
https://doi.org/10.4072/rbp.2023.4.06Abstract
Studies on taxonomy, taphonomy, and paleoecology have been conducted on fossils from carbonate caves, however, surveys detailing the fossilization processes and bone microstructure of specimens from caves are still scarce. Our paper provides an osteohistological analysis and X-ray diffraction of a fossil rib from the extinct South American porcupine Coendou magnus Lund. Our results allowed us to interpret that there was microstructural preservation and low replacement of the organic part of the bone by minerals present in the surrounding sediments, such as apatite and abundant non-silicate minerals in sedimentary rocks, characterizing preservation in an environment with poor weathering.
Keywords: cave, X-ray diffraction, late Pleistocene, histology, porcupine.
RESUMO – Estudos sobre taxonomia, tafonomia e paleoecologia têm sido conduzidos em fósseis de cavernas carbonáticas, entretanto, estudos detalhando os processos de fossilização e a microestrutura óssea de espécimes de cavernas ainda são escassos. Nosso trabalho fornece uma análise osteohistológica e difração de raios X de uma costela fóssil do extinto porco-espinho sul-americano Coendou magnus Lund. Nossos resultados permitiram interpretar que houve preservação microestrutural e baixa substituição da parte orgânica do osso por minerais presentes nos sedimentos circundantes, como apatita e minerais não silicatados abundantes nas rochas sedimentares, caracterizando a preservação em ambiente com pobre intemperismo.
Palavras-chave: caverna, difração de raio x, Pleistoceno final, histologia, porco-espinho.
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